descriptive statistics

Question 1

What are descriptive statistics

Answer 1

• They help analyse data to help describe show or summarise it in a meaningful way

Question 2

What are descriptive statistics that I need to know about

Answer 2

• Measures of central tendency
• Measures of dispersion

Question 3

What is a measure of central tendency and what are the three types

Answer 3

• Central tendency, depict an overall central trend of the data
  Mode
  Median
  Mean 

Question 4

What is the mean median and mode

Answer 4

• Mean, Is a mathematical average considering all values
• Median, is the middle score when the data is put in order
• Mode, is the most frequent school in a set of data

Question 5

Evaluate the mode

Answer 5

• Good for nominal data
• Good for discreet numbers like numbers of children
• Bad if every value in the data is different
• Bad as it doesn’t consider all values in the data

Question 6

Evaluate the median

Answer 6

• Good as it is not affected by an anomalies
• good as it is Easy to calculate
• bad as it is Not as sensitive as the mean

Question 7

Evaluate the mean

Answer 7

+ All figures in the data represented
- Can be easily affected by anomalies in the data

Question 8

What are the two measures of dispersion

Answer 8

• The range
• Standard deviation

Question 9

Explain the range and standard deviation

Answer 9

• The range is the largest value mineszz% v smallest value